The child will be seated in a comfortable chair and the physiological assessment will begin after a head circumference is obtained with a tape measure, an EEG cap is placed on the child's head and gel is applied to each electrode in the cap. The tasks include 5 minutes of baseline EEG recording while the child is looking at a design on a monitor placed 2 meters in front of the chair. We then will proceed with a series of auditory and visual stimuli presented by computer through two speakers placed 1 meter in front of the child (auditory) and strobe (visual) at 50 cm. The paradigms will include a presentation of pairs of tones with variable interstimulus intervals presented in random order at 65 dB SPL, a paradigm with either 1000 Hz or 800 Hz at 65 dB, and a final auditory paradigm with two different phonemes, presented at 65 dB. The visual tasks will involve the presentation of flashes of light which vary in frequency and luminance both reflected off a white board one meter from the child and directly at the child's visual field. In each series, there will be a 1 minute break between two blocks of 100 trials each for a total of 200 trials. The experimenter will show the child an interesting toy and talk to the child during the break.